SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
7 Network service
Page 48 of 307
Parameter
Type
Description
•
5: UTRAN with HSUPA availability
•
6: UTRAN with HSDPA and HSUPA availability
•
7: E-UTRAN
•
255: the current <AcTStatus> value is invalid
7.6.4 Notes
The following is an overview of the values assumed by the <stat> parameter:
• 0: a technical problem could have occurred, the user is requested to intervene. It is still possible to make
emergency calls if some network is available. Possible causes:
o PIN not entered
o Invalid HPLMN found on the SIM (SIM read error)
o SIM card not present
The registration is not started
• 1: the MT is registered for circuit-switched services on the HPLMN (or on one of the equivalent HPLMN's,
whose list is provided by the SIM)
• 2: the module is searching a network to register on. Possible causes:
o No network available
o Available networks have insufficient Rx level
o HPLMN or allowed PLMN are available but the registration is rejected, e.g. roaming is not allowed
in this Location Area
It is still possible to make emergency calls if network coverage is available
• 3: the CS registration failed after a Location Update Reject; possible causes are:
o Illegal MS
o Illegal ME
o IMSI unknown at HLR
o PLMN not allowed
o Location area not allowed
o Roaming not allowed in this location area
o Network failure
o Network congestion
It is still possible to make emergency calls if network coverage is available.
If the registration type is manual, then no further attempt is made to search for a new PLMN or register
with it. If the registration type is automatic, the MS may look for an allowed PLMN if the rejection cause
was roaming restriction. In case of illegal MS /ME, there could be possible problems with either the SIM
card or with the ME's identity (IMEI): user intervention may be required
• 4: this value, usually transitory, is returned if the registration state does not belong to any of the following:
o Normal
o Limited
o No service
o Service detached
o Service disabled
It may be issued after the failure of a registration procedure, before starting a PLMN search, when
<stat>=2.
• 5: the MT is registered for circuit-switched services on a VPLMN, in national or international roaming
• 6: in LTE, the MT is registered only for the SMS circuit-switched service on the HPLMN (ore on one of the
equivalent HPLMN's)
• 7: in LTE, the MT is registered only for the SMS circuit-switched service on a VPLMN, in national or
international roaming
